Android™ Application Development - Bahar Ali Khan

Chapter 5: Intents, Broadcast Receivers, Adapters, and the Internet
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4. Return to the ContactPicker Activity. Override the onCreate method, and extract the data
path from the calling Intent.
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
Intent intent = getIntent();
String dataPath = intent.getData().toString();
4.1. Create a new data URI for the people stored in the contact list, and bind it to the List
View using a SimpleCursorArrayAdapter.
The SimpleCursorArrayAdapter lets you assign Cursor data, used by Content Providers, to
Views. It’s used here without further comment but is examined in more detail later in this chapter.
final Uri data = Uri.parse(dataPath + “people/”);
final Cursor c = managedQuery(data, null, null, null, null);
String[] from = new String[] {People.NAME};
int[] to = new int[] { R.id.itemTextView };
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
R.layout.listitemlayout,
c,
from,
to);
ListView lv = (ListView)findViewById(R.id.contactListView);
lv.setAdapter(adapter);
4.2. Add an ItemClickListener to the List View. Selecting a contact from the list should
return a path to the item to the calling Activity.
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View view, int pos,
long id) {
// Move the cursor to the selected item
c.moveToPosition(pos);
// Extract the row id.
int rowId = c.getInt(c.getColumnIndexOrThrow(“_id”));
// Construct the result URI.
Uri outURI = Uri.parse(data.toString() + rowId);
Intent outData = new Intent();
outData.setData(outURI);
setResult(Activity.RESULT_OK, outData);
finish();
}
});
4.3. Close off the onCreate method.
}